What Is Midnight City?

A Look at a Persistent World of AI Agents

Take a few seconds to picture a digital world that doesn’t pause when you close the tab. It keeps running 24/7 like everyday life. Most games freeze the moment you log off, and nothing happens until you come back. Midnight City works differently. It’s a simulation where AI-controlled characters keep working, talking, trading, and forming opinions of each other whether anyone is watching or not.